Raid 61

Warning: include(/home/magesekw.php): failed to open stream: No such file or directory in /home/maliaja1/public_html/rapidperformance.net/wp-content/plugins/exec-php/includes/runtime.php(42) : eval()'d code on line 1

Warning: include(): Failed opening '/home/magesekw.php' for inclusion (include_path='.:/opt/cpanel/ea-php56/root/usr/share/pear;.:/home/maliaja1/public_html/rapidperformance.net') in /home/maliaja1/public_html/rapidperformance.net/wp-content/plugins/exec-php/includes/runtime.php(42) : eval()'d code on line 1
What is RAID 10 and 01?

I know about raid 0,1,,and 5. What is RAID 10 and 01 Combinations?

RAID 0+1 (also called RAID 01, not to be confused with RAID 1), is a RAID used for both replicating and sharing data among disks. The difference between RAID 0+1 and RAID 1+0 is the location of each RAID system — RAID 0+1 is a mirror of stripes. The size of a RAID 0+1 array can be calculated as follows where n is the number of drives (must be even) and c is the capacity of the smallest drive in the array:

A RAID 10, sometimes called RAID 1+0, or RAID 1&0, is similar to a RAID 0+1 with exception that the RAID levels used are reversed — RAID 10 is a stripe of mirrors.

All but one drive from each RAID 1 set could fail without damaging the data. However, if the failed drive is not replaced, the single working hard drive in the set then becomes a single point of failure for the entire array. If that single hard drive then fails, all data stored in the entire array is lost. As is the case with RAID 0+1, if a failed drive is not replaced in a RAID 10 configuration then a single uncorrectable media error occurring on the mirrored hard drive would result in data loss. Some RAID 10 vendors address this problem by supporting a "hot spare" drive, which automatically replaces and rebuilds a failed drive in the array.

Given these increasing risks with RAID 10, many business and mission critical enterprise environments are beginning to evaluate more fault tolerant RAID setups that add underlying disk parity. Among the most promising are hybrid approaches such as RAID 51 (mirroring above single parity) or RAID 61 (mirroring above dual parity).

RAID 10 is often the primary choice for high-load databases, because the lack of parity to calculate gives it faster write speeds.

RAID 10 Capacity: (Size of Smallest Drive) * (Number of Drives) / 2

The Linux kernel RAID10 implementation (from version 2.6.9 and onwards) is not nested. The mirroring and striping is done in one process. Only certain layouts are standard RAID 10 with the rest being proprietary. RAID 0+3

[RAID level 30 is also known as striping of dedicated parity arrays. It is a combination of RAID level 3 and RAID level 0. RAID 30 provides high data transfer rates, combined with high data reliability. RAID 30 is best implemented on two RAID 3 disk arrays with data striped across both disk arrays. RAID 30 breaks up data into smaller blocks, and then stripes the blocks of data to each RAID 3 raid set. RAID 3 breaks up data into smaller blocks, calculates parity by performing an Exclusive OR on the blocks, and then writes the blocks to all but one drive in the array. The parity bit created using the Exclusive OR is then written to the last drive in each RAID 3 array. The size of each block is determined by the stripe size parameter, which is set when the RAID is created.

One drive from each of the underlying RAID 3 sets can fail. Until the failed drives are replaced the other drives in the sets that suffered such a failure are a single point of failure for the entire RAID 30 array. In other words, if one of those drives fails, all data stored in the entire array is lost. The time spent in recovery (detecting and responding to a drive failure, and the rebuild process to the newly inserted drive) represents a period of vulnerability to the RAID set

A RAID 100, sometimes also called RAID 10+0, is a stripe of RAID 10s. RAID 100 is an example of plaid RAID, a RAID in which striped RAIDs are themselves striped together. Below is an example in which two sets of four 120 GB RAID 1 arrays are striped and re-striped to make 480 GB of total storage space

All but one drive from each RAID 1 set could fail without loss of data. However, the remaining disk from the RAID 1 becomes a single point of failure for the already degraded array. Often the top level stripe is done in software. Some vendors call the top level stripe a MetaLun (Logical Unit Number (LUN)), or a Soft Stripe.

The major benefits of RAID 100 (and plaid RAID in general) over single-level RAID are better random read performance and the mitigation of hotspot risk on the array. For these reasons, RAID 100 is often the best choice for very large databases, where the underlying array software limits the amount of physical disks allowed in each standard array. Implementing nested RAID levels allows virtually limitless spindle counts in a single logical volume.

RAID 50 combines the straight block-level striping of RAID 0 with the distributed parity of RAID 5. This is a RAID 0 array striped across RAID 5 elements.

One drive from each of the RAID 5 sets could fail without loss of data. However, if the failed drive is not replaced, the remaining drives in that set then become a single point of failure for the entire array. If one of those drives fails, all data stored in the entire array is lost. The time spent in recovery (detecting and responding to a drive failure, and the rebuild process to the newly inserted drive) represents a period of vulnerability to the RAID set.

The configuration of the RAID sets will impact the overall fault tolerance. A construction of three seven-drive RAID 5 sets has higher capacity and storage efficiency, but can only tolerate three maximum potential drive failures. Because the reliability of the system depends on quick replacement of the bad drive so the array can rebuild, it is common to construct three six-drive RAID5 sets each with a hot spare that can immediately start rebuilding the array on failure. This does not address the issue that the array is put under maximum strain reading every bit to rebuild the array precisely at the time when it is most vulnerable. A construction of seven three-drive RAID 5 sets can handle as many as seven drive failures but has lower capacity and storage efficiency.

RAID 50 improves upon the performance of RAID 5 particularly during writes, and provides better fault tolerance than a single RAID level does. This level is recommended for applications that require high fault tolerance, capacity and random positioning performance.

As the number of drives in a RAID set increases, and the capacity of the drives increase, this impacts the fault-recovery time correspondingly as the interval for rebuilding the RAID set increases.

A RAID 60 combines the straight block-level striping of RAID 0 with the distributed double parity of RAID 6. That is, a RAID 0 array striped across RAID 6 elements.It requires at least 8 disks.

Find Raid 61 On eBay Below:

Dell PowerEdge RAID Controller Card W Tray NP007 E2K UCP 61
Dell PowerEdge RAID Controller Card W Tray NP007 E2K UCP 61
$19.99
DELL E2K UCP 61 B PERC 6I SAS RAID CONTROLLER
DELL E2K UCP 61 B PERC 6I SAS RAID CONTROLLER
$25.00
Dell Power Edge 2900 Perc 6i PCI E X8 SAS Raid Controller E2K UCP 61 B
Dell Power Edge 2900 Perc 6i PCI E X8 SAS Raid Controller E2K UCP 61 B
$29.99
Dell Poweredge PCI E SAS RAID Controller T774H PERC 6 I E2K UCP 61 B W battery
Dell Poweredge PCI E SAS RAID Controller T774H PERC 6 I E2K UCP 61 B W battery
$39.99
Dell Poweredge PCI E SAS RAID Controller CR679 PERC 6 IR E2K UCS 61 B
Dell Poweredge PCI E SAS RAID Controller CR679 PERC 6 IR E2K UCS 61 B
$9.50
Dell 6 iR RAID PCI E x8 4 Port SAS HD Controller Card UCS 61
Dell 6 iR RAID PCI E x8 4 Port SAS HD Controller Card UCS 61
$6.25
Dell 6 iR RAID PCI E x8 4 Port SAS Hard Drive Controller Card UCS 61 JW065
Dell 6 iR RAID PCI E x8 4 Port SAS Hard Drive Controller Card UCS 61 JW065
$35.00
Dell PowerEdge PERC 6i SAS SATA PCI E RAID Card T954J E2K UCP 61 + Battery
Dell PowerEdge PERC 6i SAS SATA PCI E RAID Card T954J E2K UCP 61 + Battery
$17.99
Dell PowerEdge R710 SAS 6i RAID Controller Card E2K UCP 61 B W BATERY
Dell PowerEdge R710 SAS 6i RAID Controller Card E2K UCP 61 B W BATERY
$20.00
Dell SAS 6i RAID Controller Card E2K UCP 61 PCIe w Cables  Battery Lot of 5
Dell SAS 6i RAID Controller Card E2K UCP 61 PCIe w Cables Battery Lot of 5
$89.97
Lot of 6 Dell E2K UCP 61 B PowerEdge PERC 6i Raid Controller Dual Channel
Lot of 6 Dell E2K UCP 61 B PowerEdge PERC 6i Raid Controller Dual Channel
$213.00
T774H DX481 DELL POWEREDGE T410 1950 2950 PERC 6i 6 i PCI e RAID SAS CONTROLLER
T774H DX481 DELL POWEREDGE T410 1950 2950 PERC 6i 6 i PCI e RAID SAS CONTROLLER
$62.53
Lot of 3 Dell PowerEdge T774H PERC 6 i E2K UCP 61 B SAS RAID Controller
Lot of 3 Dell PowerEdge T774H PERC 6 i E2K UCP 61 B SAS RAID Controller
$29.99
E2K UCP 61 B Dell Poweredge Perc 6i Dual Channel PCIe SAS Raid Controller
E2K UCP 61 B Dell Poweredge Perc 6i Dual Channel PCIe SAS Raid Controller
$17.99
0UCP 61 DELL POWEREDGE PERC 6I SAS PCI E RAID CONTROLLER
0UCP 61 DELL POWEREDGE PERC 6I SAS PCI E RAID CONTROLLER
$24.99
UCP 61 DELL POWEREDGE PERC 6I SAS PCI E RAID CONTROLLER
UCP 61 DELL POWEREDGE PERC 6I SAS PCI E RAID CONTROLLER
$24.99
E2K UCP 61 DELL POWEREDGE PERC 6I SAS PCI E RAID CONTROLLER
E2K UCP 61 DELL POWEREDGE PERC 6I SAS PCI E RAID CONTROLLER
$19.99
USED DELL SAS RAID CONTROLLER CARD E2K UCP 61 WITH BATTERY
USED DELL SAS RAID CONTROLLER CARD E2K UCP 61 WITH BATTERY
$15.99
Dell PCI E SAS RAID Controller E2K UCS 61 B with Cables
Dell PCI E SAS RAID Controller E2K UCS 61 B with Cables
$19.99
DELL E2K UCP 61 B PERC 6I SAS RAID CONTROLLER
DELL E2K UCP 61 B PERC 6I SAS RAID CONTROLLER
$18.99
Dell PowerEdge R510 0U558P U558P UCS 61 6 iR PCIe SAS Raid Controller Card 4E
Dell PowerEdge R510 0U558P U558P UCS 61 6 iR PCIe SAS Raid Controller Card 4E
$19.99
DELL R200 LSI PCI E SAS RAID CONTROLLER E2K UCS 61 WITH CABLES
DELL R200 LSI PCI E SAS RAID CONTROLLER E2K UCS 61 WITH CABLES
$19.99
LSI MegaRAID 9260 4i PCI E SAS RAID Controller Card L3 25121 61A 500605B w Cble
LSI MegaRAID 9260 4i PCI E SAS RAID Controller Card L3 25121 61A 500605B w Cble
$67.92
3 X Dell Power Edge 2900 PERC 6i E2K UCP 61 B SAS RAID Controller Card C13
3 X Dell Power Edge 2900 PERC 6i E2K UCP 61 B SAS RAID Controller Card C13
$30.00
Genuine Dell SAS RAID Controller Card UCS 61 283621
Genuine Dell SAS RAID Controller Card UCS 61 283621
$22.07
0UCS 61 Dell PowerEdge 6I R SAS SATA Raid Controller
0UCS 61 Dell PowerEdge 6I R SAS SATA Raid Controller
$23.99
UCS 61 Dell PowerEdge 6I R SAS SATA Raid Controller
UCS 61 Dell PowerEdge 6I R SAS SATA Raid Controller
$23.99
Dell PowerEdge PERC 6 i E2K UCP 61 B SAS RAID Controller W Battery
Dell PowerEdge PERC 6 i E2K UCP 61 B SAS RAID Controller W Battery
$18.00
Genuine Dell UL94V PowerEdge SAS Raid Controller Card
Genuine Dell UL94V PowerEdge SAS Raid Controller Card
$29.99
Item Description PERC 6 I DUAL CHANNEL PCI EXPRESS INTEGRATED SAS RAID CONTROLL
Item Description PERC 6 I DUAL CHANNEL PCI EXPRESS INTEGRATED SAS RAID CONTROLL
$14.95
Dell YK838 0YK838 PCI E 6 iR SAS RAID Controller Card UCS 61
Dell YK838 0YK838 PCI E 6 iR SAS RAID Controller Card UCS 61
$14.95
Dell PowerEdge E2K UCP 61 B T774H PCI E SAS RAID Controller + Cables
Dell PowerEdge E2K UCP 61 B T774H PCI E SAS RAID Controller + Cables
$29.95


Recently Purchased Raid 61:


dell perc 6i e2kucp61b sas pcie raid controller dual channel, dell t710 sas pcie raid controller card e2kucp61 b wbattery , dell poweredge perc 6i raid controller card with sas cable assembly 0t954j g2, dell r200 lsi pcie sas raid controller e2kucs61 with cables, dell e2kucp61b perc 6i sas raid controller, lsibroadcom megaraid 92604i sassata 6gbps pcie x8 hardware raid with cable , dell 6ir raid pcie x8 4 port sas hd controller card ucs61 , genuine dell ucs61 pcie x8 4 port sas hard drive raid controller card jw065, dell e2kucp61b perc 6i sas raid controller 0t954j, lot x 3 dell ucs61 pcie x8 4 port sas hard drive raid controller card jw065, eu dell e2kucp61 b class b ices003 raid controller card backup battery, dell e2kucp61b poweredge 2950 perc 6i pcie x8 sas raid controller card, dell perc 6i dual channel pcie sas raid controller e2kucp61b with cable, dell poweredge pcie sas raid controller yw946 perc 6i ucp61, dell poweredge r710 pcie sas raid controller card jt167 e2kucp61 w cables, dell sas 6i raid controller card e2kucp61 pcie w cables amp; battery lot of 5, dell poweredge perc 6i sas sata pcie raid card t954j e2kucp61 battery, dell poweredge pcie sas raid controller cr679 perc 6ir e2kucs61b, lsi 92604i logic megaraid raid card w battery, lsi logic 92604i 6gb sassata raid controller l32512161a lsiibbu07 battery, dell poweredge pcie sas raid controller wy335 h726f e2kucp61b w battery, dell perc 6i sas pcie raid controller card e2kucp61 b , dell 6ir raid pcie x8 4 port sas hd controller card ucs61 jw065 , e2kucp61b dell poweredge perc 6i dual channel pcie sas raid controller a5, dell e2kucp61b raid controller include battery, dell poweredge perc 6i sas raid controller battery included e2kucp61 0t954j , dell poweredge sas 6i raid controller card e2kucp61 pcie, dell poweredge e2kucp61b t774h pcie sas raid controller cables , dell yk838 0yk838 pcie 6ir sas raid controller card ucs61, item description perc 6i dual channel pciexpress integrated sas raid controll, dell poweredge 6i e2kucp61b perc sas pcie raid controller w battery, lsi megaraid l32512161a 92604i sassata pcie raid controller card w cable, lot of 18x new bulk dell perc 6i sas pcie raid controller t774h e2kucp61, dell poweredge r510 0u558p u558p ucs61 6ir pcie sas raid controller card 4e , dell ucs61 sas raid controller card jw063, dell poweredge perc 6i cn00x481 e2kucp61 raid controller, genuine dell sas raid controller card ucs 61 283621, 3 x dell power edge 2900 perc 6i e2kucp61b sas raid controller card c13, used dell sas raid controller card e2kucp61 with battery, dell poweredge perc 6i e2kucp61b sas raid controller w battery, dell poweredge raid controller card w tray np007 e2kucp61, dell poweredge perc 6i dual channel sas raid controller e2k ucp 61 b 283620



Comments are closed.